Electromagnetic shift for headlights.



H. SpGOVE.

ELECTROMAGNETIC SHIFT FOR HEADLIGHTS.

APPLICATION FILED OCT. 21, I916.

Patented July 17, 1917.

Show 1 ELECTROMAGNETIC SHIFT FOR HEADLIGI-I'IS.

Specification of Letters Patent.

Patented July at, 1am.

Application filed October 21, 1916. Serial No. 127,001.

To all whom it may concern:

Be it known that I, HENRY S. Govn, a citizen of the United States, residing at Moorhead, in the county of Sunflower and State of Mississippi, have inventedcertain new and useful Improvements in Electromagnetic Shifts for Headlights; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in electro-magnetic apparatus in the appended claims.

My invention is illustrated in the accompanying drawings, in which:

Figure 1 is -a central vertical sectional view through an electro-magnet showing the lamp bracket in elevation.

Fig. 2 is a top plan view of the cover to the casing.

Fig. 3 is a sectional view through a hollow, internally threaded nut which rotates with the shank of the lamp bracket.

Fig. 4 is a. section on the line 41 of Fig. 1.

Reference now being had to the details of the drawings by letter, A designates a lamp bracket having a shank portion B with threads B of a rather steep pitch, said shank being preferably of anon magnetic' material. A casing G is provided with an apertured bottom and a cover T which is apertured as at R, the apertures in the top and bottom adapted to receive the'shank portion B of the lamp bracket. Said cover has threaded connection with threads upon the circumference of the casing, and a collar N, integral with the shank portion of the lamp bracket, bearsagainst said cover, while a washer J is held against a shoulder J near the lower end of the shank B and is held against said shoulder by means of the nut H fitted to the lower threaded end of the shank. By this construction, it will be noted that the shank portion of the lamp bracket is held from moving longitudinally through the casing. The threads B upon the shank B engage interior threads formed in the nut D, which latter is made of iron or other magnetic material and rests within guidesF upon the bottom of the casing for holding the lower portion of the nut D, which is angular, from rotation but permitting a vertical movement to the nut within certain limits. Said inclosing casing for the .operative features of the device is preferably of cylindrical construction and conce11- 'trio with the shank portion of the lamp bracket.

Attached to the top of the casing are the electro-magnets O of sufficient number and strength to operate the device. The lower ends of said magnets are rigidly attached to a, ring or band Q, having a running fit inside the casing but not attached thereto. Immediately below the face pieces of the magnets is a nut L having a circumferential flange interiorly threaded as at L and of nonmagnetic material and of the shape shown and which is rigidly attached to the shank'portion of the lamp bracket and consequently rotates therewith, thus allowing said nut to rotate but have no vertical movement within the casing. Between the under face of the nut L and the upper surface of the nut D are springs S arranged as may be necessary to cause the threads of the interlocking nuts to be firmly engaged and to act in conjunction with the weight of the nut D in returning the latter to its seat.

Said nut D, it will be understood, shall have suh'icient weight so that, acting in conjunction With the springs, it will turn the lamp bracket to its forward position'upon the descent of the nut D.

The eration of the apparatus is as fol lows pon the excitation of the magnets,

the nut D will'rise or be lifted by the force of the magnetic attraction and, as it rises, it engages the threads of the shank portion B of the lamp bracket and which latter is restrained from a vertical motionras is also the magnet, the height or rise of the nut D Will be controlled, thus giving the desired amou'ntof turn tothelight.

By the provision of the nuts D'and'L, arranged as shown and described, the action of the device is renderedstable, that is the jolting of the vehicle on which the device is mounted "will not cause the nut D to rise or fall, rendering the direction 'ot'the light unstable. This increased stability is caused by the fact that the external "threads of the nut D, though having the same pitch as the internal threads, has this distributed over a I much larger circumference, thus making the threads more nearly fiat per unit length of thread. By virtue of this greater flatness, greater force would be required to cause a sudden rising or falling of the nut D, such as there might be tendency "to through sudden jo'ltin'g of the vehicle to which the 'device is applied; While the external thread is not instrumental in the normal rise or fall of the nut D, any impulse will act upon it. coincident with the action on steeper thread on the shankportion of the lamp bracket and, being more'nearly flat per unit of length, will serve as a restriction to the sudden ascent or descent of the nut D. What I claim to be new is 1. An electro-magnetic shifting device for headlights of vehicles etc., comprising a casing, a light supporting bracket having a "threaded, shank portion rotatably mounted within said cas1ng,a nut within the casing and internally threaded to engage thefthrea ds 9 o f'said shank portion ofthe lamp bracket, eans for preventmg said nut from rotation,

r the brack'tlto turn in one direction, and

'el'eCtro-r'nagnets adapted to cause the nut to be movedtoward the magnets thus causing .means for returning the nut to its normal 2 position.

ing, a light supporting bracket having a threaded shank portion rotatably mounted within said casing, a nut within the casing and internally threaded to engage the threads of said shank portion of the lamp bracket, means for preventing said nut from rotation, at second nut rotating with the shank portion of the lamp bracket and having internal teeth engaging a spiral groove in the circumference of the first mentioned nut, electramagnets within the casing and designed, when energized, to cause the nut upon the shank portion of the bracket member to move vertically, and means for returning the bracket to its normal position.

I 3. An electro-magneticshitting device for headlights of vehicles, :etc, comprising a casing, a light supporting bracket having a threaded shank portion rotatably mounted within said casing, a nut within the casing and internally threaded toen'gage the threads of said shank portion of the lamp bracket, means for preventing said nut from rotation, a second nut rotating with the shank portion of the lamp bracket and having internal teeth engaging a spiral groove in the circumference of the first mentioned nut, electro-magnets withinthe casing and designed, when energized, to cause the nut upon the shank portion of the bracket member to move vertically, a spring interposed between the nuts and serving to return the same to their normal positions.

4. An electro-magnetic shitting device for headlights of vehicles, etc, comprising a'casing, a top and bottom with registering apertures therein, a lamp bracket having a shank portion passing through said apertures and circumferentially threaded, means upon the shank portion of the lamp bracket and bearing against the top and bottom of the easing to prevent longitudinal movement of said shank portion, a nut mounted within the casing and having an angular outlined portion, means within the casing engaging said angular portion to prevent the nut from rotation, the circumference of the latter having a spiral groove, a nut fastened to the shank portion and having internal threads engaging said spiral groove, springs bearing intermediate said nuts, and electro-magnets within the casing above the nuts.

5. An electro-magnetic shifting device for headlights of vehicles, etc, comprising a casing, a top and bottom with registering apertures therein, a lamp bracket having a shank portionpassing through said apertures and circumferentially threaded, means upon the shank portion of the lamp bracket and bearing against the top and bottom of the easing to prevent longitudinal movement of said shank portion, a nut mounted within of the casing", and a ring within the latter the casing and having an angular outlined and engaging said electro-magnets. 10 portion to prevent the nut from rotation, the In testimony whereof I hereunto afiix my circumference of the latter having a spiral signature in presence of two Witnesses.

; groove, a nut fastened to the shank portion HENRY SHIMER GOVE.

and having internal threads engaging said Witnesses: spiral groove, springs bearing intermediate SAM SIEGEL, said nuts, eleotro-magnets secured to the top G. W. WALLIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of .Eatents, Washington, D. G." 

